Briquet for making oxygen.



1T0 Drawing.

- mixtures in a state of impalpable powder, to

UNITED STATES PATENT OFFICE.

GEORGE FRANQOIS JAU'ZBERT, 0F PARIS, FRANCE.

vgpplication filed April 24, 1906. Serial No. 313,509.

Barnum: non MAKING OXYGEN.

Specification of Iietters Patent. Patented July 26,1910.

To all whom iimwy concern:

Be it known-that I, GEORGE FRANQOIS JAUBERT, doctor of science, a citizen of the French Republic, residing at 155 Boulevard Malesherbes, Paris, in the Republic of France, have invented certain new and useful Improvements in Briquets for Producing 'Oxygemof which the following is a specification.

liberating during their combustion practically pure oxygen. These'briquets are preor some. other solvent, a mixture of an oxygenated salt, suchas the perchlorates and the nitrates, with a small proportion of combustible such as carbon and of an approprh ate inert material. Briquets prepared by compression in a dry state from these three elements and the process of producing oxyen or gases rich in oxygen from said riquets, are described in my co-pending application Se ial 289,368 for improvements in the preparation of oxygen by-the decomposition of oxy enated salts.

The briquets obtained by the compression in a dry state ofva mixture of perchlorate, nitrate or other salt rich in oxygen, with pulverulent combustible such as carbon .do not present sufficient cohesion to prevent their crumbling at the least shock, which renders it exceedingly diflicult to handle or transport them from place to place. Further it is almost impossible, even by employing obtainby dry compression blocks which are sufliciently homogeneous to insure that each article of c mbustible materialshall be in immediate contact with the necessary quantityof particles capable of supporting com- The present invention has for its obiect the production of cakes,'blocks, or briquets.

pared by kneading, in the presence of vatcr ,chlorate which, being thus dissolved, penethe weight of the'oxygenated salt employed. a This water dissolves a'smallpart of thepertrates the entire mass uniformly, and after evaporation, agglomerates the briquet pre cisely in the manner of a cement, imparting to it the desired cohesion. combustible being uniforml covered with material capable of supporting combustion, the combustion takes place regularly with less carbon and the oxygen I obtained is thereforemore pure. Finally, the evaporation of the solventleaves pores in the blocks or briquetsfthus permittingtthe gas produced to become liberated freely. without causing The preparation of the paste serving to The particles of any considerable deformations of] the mass. i

form the briquets may be'efl'ected eitherby preparing a solution (if-perchlorate (or otheroxygena'tedsalt employed) to which the various ingredients are added in succession, or by directly adding the W316ior other solvent to the other ingredients mixedfin adry state. In the first case there is'dissolved in a quantity of Water equal in weight to about one half of the perchlorate to be employed a small part (5% for example) of the total quantity of perchlorate to be employed, then the carbon in powder and the inert material serving to moderate the rapidity of the combustion are added to the solution obtained. In this manner an. ex-- ceedingly fluid paste is obtained and this is agitateduntil complete homogeneity is pro.-,

duced. The rest of the perchlorate in the? condition of a very fine powder is then added and the mass is mixed or kneaded,.in

a mechanical mixer for example, until a f perfectly uniform paste is obtained which is cut into cakes and then thoroughly dried.

bustion. The combustion is therefore defective and in order that it may take place 45 uniformly necessitates a high'proportion of If an efiicient kneading apparatus is available the second method indicated may be adopted, the previous solution of a part of combustible material contaminating the oxygen by the products of its combustion. In addition, the as produced, in endeavoring to liberate itse 1?, produces detormations'andthe perchlorate or other oxygenated salt employed being dispensed with. The three powders (perchlorate, carbon and inert ma- 'terial) are formed into adry mixture, then swellings' of the briquet. Inaccordance "L with the resent invention these defects are obviated y employing the perchlorate (or. other oxygenated salt) and other ingredients not in a dry state but in adding thereto a considerable quantity of water or other solventwhich may even exceed one half of a quantity of water slightly greater than in the preceding is added and the mass thoroughly kneaded. The paste obtained is then out into cakes or briquets and dried. For example 100 kilograms of'perclilorate of potash (K010 in as fine a powder as 58 possible maybe mlxed with 3 kilograms of v so sire wood charcoal in powder" and 20 kilograms offcalcinedand pulverized .infusorial earth. The mixture is bolted in orderto' render it perfectly, homogeneous and then introduced with 50to '55 liters of Water into a kneading inachinewhich is then started. As soon as the,(paste is homogeneous, cakes of the deshape are formed precisely as if modeling-clay were being dealt 'withand drying is then efiected.

Numerous experiments, have shown the Inventor that ofall the oxygenated salts perchlorate of potash gives the best results,

the-other perchlorates give inferior results 'whilejthe nitrates give-[acid gas mixtures diflicult to purify. inayhowever be'utilized likewise.

These different salts Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what-I claim iS '1,.- -A dry, cemented, porous, combustible,-

n'on e'xplosive briquet for produci'ngoxygen,

'made'up of'an oxygenated salt associated with a combustible material,-'the particles of which are'coatedwith a portion of the oxygenated salt and the quantity of which is limited to that necessary to produce, by combining with a small proportion of the oxygen, the necessary temperature of reaction i or also dissociatlng the'mass of oxygenated salt, and with'a; quantity of inert material for retarding the reaction; substantially as described.

2. A dry, porous, combustible, non-explosive briquet for producing oxygen made up of an oxygenated salt associated with a quantity of "combustible material limited to that "necessary to produce, by combining --With' a small proportion of the oxygen, the

necessary temperature of reaction for also dissociating. the mass of oxygenated salt, and With an inert material for retarding the reaction, the briqu'et being cemented t0- gether by a part of the oxygenated salt serving as abinding medium for the remaining particles of the mixture; substan: tially as described.

- 3.- A dry,*cemented, porous, combustible,

non-explosive briquetfor producing oxygen,-

made up of one hundred parts qf powdered perchlorate of potash mixed ,With three parts of powdered charcoal, the particles of seventh 'daly of A ri-l'1906.

GEORGE F tANQOIS JAUBERT. In the presence of- I HANso'N O. OOXE,

I'IENRY SCHWAB. 

